Simple try catch with open tracing

index.js

 const thundra = require('@thundra/core');
  
  exports.handler = thundra({
         apiKey : <Your API Key>
   })((event, context, callback) => { 
        const tracer = thundra.tracer(); 
        const span = tracer.startSpan('say-hello');
    
        try {
            const message = sayHello('Thundra');
            span.setTag('msg', message);
            span.finish();
            callback(null, {msg: message});
        } catch (err) {
          span.setTag('error', err.message);
          span.setTag('stack trace', err.stack);
          span.finish();
        }  
  });